I just upgraded from Windows XP Pro to Windows 7 Pro 32-bit. I'm running an Intel i7 920 with 6GB of RAM. My question is that on the Computer, it says I have 6GB of RAM only 2.49 of it is usable. The reason why I upgraded in the first place is that I wanted the OS to use more of the RAM because XP limited it by less than half.

Do I need to buy the 65-bit version of Windows 7 Pro in order to use the other 3.5 GB my PC isn't using?

I have a whoooole lotta programs installed and reinstalling them one by one will be a major pain in the butt, including WoW which is like 40GB alone with the patches. Steam, games, add ons, etc... it's gonna be a pain

Will 32-bit programs work with windows 7 64-bit? I have an old photshop copy that came out years ago that I want to install, as well as older games and programs designed to work with 32 bit.

Most will, yes.Win7 x64 runs 32-bit programs in an emulation layer (MS calls it "Windows on Windows" (or, WOW64.)And, generally, if it runs on Win7 x86, it'll run on Win7 x64. But, there are always expections. When in doubt, check with the software vendor.

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